Moscovia 2 has a little puddle you can waterball stuff from =x it's in the very north middle =x
And this sorta brings me back to my HUGE Want that there be a DB room that is NOTHING BUT water. I would so love to spam Whatever MVP's I could get with waterball. Especially things I could probably oneshot like Eddga.
Now, I coulda done this back before they made it so you CAN"T DB on maps outside the DB rooms on those maps that HAD water, but /meh. At the very least, it's fun giving Drake a taste of his own medicine (even if it is 5 levels inferior.)